Furthermore, although humans can be trained to code reliably the morphology of facial expressions which muscles are activeit can be quite difficult to code the dynamics of the expression the activation and movement patterns of the muscles as a function of time. Alternatively or in addition, the filter bank module can produce a set of characteristics or parameters representing contents of the image window. Application to Video Analysis We used the AU classifiers to qualitatively and quantitatively analyze the dynamic facial expression changes in videos. The middle subject is exhibiting a subtle expression which is barely perceived as sadness by an observer. Another thing to consider is how much time you are willing to invest.
In particular, inappropriate and flattened facial affect are well-known characteristic symptoms of schizophrenia Bleuler ; Andreasen a ; Shtasel et al.
Facial Action Coding System FAQs
We apply the qualitative and quantitative analyses developed in Section 3 to these videos and present preliminary results. After the face is extracted and aligned, at a collection of one or more windows is defined at several locations of the face, and at different scales or sizes. An automated system would enable exploration of such research questions. The image can be received by one or more of a variety of inputs, including but not limited to accessing the database or one or more other databases, either locally or via the networkby reading from a computer readable medium such as a computer memory or portable storage device, by optically scanning from a physical hard copy of the image, or the like. Other features and advantages of the subject matter described herein will be apparent from the description and drawings, and from the claims. For example, early studies of smiling focused on subjective judgments of happiness, or on just the mouth movement e. Background In this section we briefly summarize advances in the literature on automated facial expression recognition.